CVE-2021-34485: microsoft microsoft visual studio 2017 version 15.9 (includes 15.0 - 15.8)
CVSS: 5.0v3.1MediumModified
AliasesRHSA-2021:3144RHSA-2021:3145GHSA-vgwq-hfqc-58wvBIT-dotnet-2021-34485BIT-dotnet-sdk-2021-34485
Published 12-08-2021Last modified 07-10-2026
Vulnerability summary
CVE-2021-34485 is a medium (CVSS 5.0) vulnerability in microsoft microsoft visual studio 2017 version 15.9 (includes 15.0 - 15.8). EPSS estimates a 2.07% chance of exploitation in the next 30 days, higher than 81% of scored vulnerabilities.
CVSS score
5.0/10
010
Medium · v3.1 (CVE.org)EPSS score
2.07%
0%100%
Low · +0.61 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 4Timeline
- 12-08-2021PublishedVulnerability first disclosed.
- 07-10-2026Last modifiedVulnerability information updated.
Description
.NET Core and Visual Studio Information Disclosure Vulnerability
CVSS metrics
5 scores · 4 sources · 2 versionsMedium 5.0Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:CSources4 sources · 5.0–5.5
- OSV · Red hatEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NDiffers
- OSV · NugetEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NDiffers
- NVDNIST5.0MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Low 2.1Preferred score · NVD (NIST)
AV:L/AC:L/Au:N/C:P/I:N/A:NSourcesSingle source
EPSS trend
Probability
2.07%
Chance of exploitation in the next 30 days
Percentile
81%
Versus all other CVEs
30-day change
+0.61 pp
From 1.46% on 19-09-2026
19-09-202619-10-2026
EPSS score2.07%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
NuGet24 products
- Microsoft.NETCore.App≥ 2.1.0, < 2.1.29
- Microsoft.NETCore.App.Runtime.linux-arm≥ 3.1.0, < 3.1.18 | ≥ 5.0.0, < 5.0.9
- Microsoft.NETCore.App.Runtime.linux-arm64≥ 3.1.0, < 3.1.18 | ≥ 5.0.0, < 5.0.9
- Microsoft.NETCore.App.Runtime.linux-musl-arm≥ 5.0.0, < 5.0.9
- Microsoft.NETCore.App.Runtime.linux-musl-arm64≥ 3.1.0, < 3.1.18 | ≥ 5.0.0, < 5.0.9
Redhat18 products
- dotnet< 0:2.1.525-1.el8_4
- dotnet-debuginfo< 0:2.1.525-1.el8_4
- dotnet-debugsource< 0:2.1.525-1.el8_4
- dotnet-host-fxr-2.1< 0:2.1.29-1.el8_4
- dotnet-host-fxr-2.1-debuginfo< 0:2.1.29-1.el8_4
Microsoft15 products
- microsoft visual studio 2017 version 15.9 (includes 15.0 - 15.8)≥ 15.9.0, < 15.9.38
- microsoft visual studio 2019 version 16.10 (includes 16.0 - 16.9)≥ 16.10.0, < 16.10.5
- microsoft visual studio 2019 version 16.4 (includes 16.0 - 16.3)≥ 16.0, < 16.4.25
- microsoft visual studio 2019 version 16.7 (includes 16.0 – 16.6)≥ 16.0.0, < 16.7.18
- microsoft visual studio 2019 version 16.9 (includes 16.0 - 16.8)≥ 15.0.0, < 16.9.10
3 vendors · 57 products
References
14 links
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34485X Refsource MISCX TransferredWEBPatchVendor Advisory
